/* ============================================================
   VARIABLES & RESET  —  Light / MIT-Stanford theme
   ============================================================ */
:root {
  --bg:           #ffffff;
  --bg-alt:       #f5f5f3;
  --surface:      #ffffff;
  --surface-2:    #eeeeec;
  --border:       rgba(0, 0, 0, 0.09);
  --border-hover: rgba(0, 0, 0, 0.18);

  --accent:       #c8102e;        /* KU Crimson */
  --accent-dark:  #a00d24;
  --accent-glow:  rgba(200, 16, 46, 0.12);

  --indigo:       #4f46e5;
  --indigo-glow:  rgba(79, 70, 229, 0.1);

  --text:         #111118;
  --text-muted:   #5a5a72;
  --text-light:   #8888a0;

  --nav-h:        64px;
  --r:            10px;
  --r-lg:         16px;

  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --t:            0.25s;
  --shadow-sm:    0 1px 4px rgba(0,0,0,0.07), 0 2px 12px rgba(0,0,0,0.05);
  --shadow:       0 2px 16px rgba(0,0,0,0.09), 0 1px 4px rgba(0,0,0,0.06);
  --shadow-lg:    0 8px 40px rgba(0,0,0,0.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

#about, #research, #education, #work, #publications, #awards, #skills, #contact {
  scroll-margin-top: var(--nav-h);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  line-height: 1.2;
}
strong { font-weight: 600; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 32px;
}

.section      { padding: 88px 0; }
.section-alt  { background: var(--bg-alt); }

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  display: inline-block;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 10px;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 12px;
  margin-bottom: 48px;
}

.subsection-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 56px 0 24px;
  letter-spacing: 0.01em;
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.reveal, .fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.visible, .fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 11px 24px;
  border-radius: 8px;
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--text);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 11px 24px;
  border-radius: 8px;
  border: 1.5px solid var(--border-hover);
  transition: background var(--t), transform var(--t), border-color var(--t);
}
.btn-secondary:hover {
  background: var(--bg-alt);
  border-color: rgba(0,0,0,0.25);
  transform: translateY(-2px);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--t);
}
.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-menu a {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 7px;
  transition: color var(--t), background var(--t);
}
.nav-menu a:hover { color: var(--text); background: rgba(0,0,0,0.04); }
.nav-menu a.active { color: var(--text); font-weight: 600; }

.nav-cv {
  background: var(--accent) !important;
  color: #fff !important;
  margin-left: 6px;
  border-radius: 7px !important;
}
.nav-cv:hover { background: var(--accent-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--t);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg);
  overflow: hidden;
}

/* Very subtle warm tinted background shapes */
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 80% 10%, rgba(200,16,46,0.055) 0%, transparent 60%),
    radial-gradient(ellipse 55% 55% at 10% 90%, rgba(79,70,229,0.05)  0%, transparent 60%);
}

/* Fine line grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 32px;
  padding-top: var(--nav-h);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 72px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(200,16,46,0.07);
  border: 1px solid rgba(200,16,46,0.2);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: blink 2.6s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

.hero-name {
  font-size: clamp(3rem, 6.5vw, 4.8rem);
  font-weight: 700;
  line-height: 1.02;
  margin-bottom: 14px;
  color: var(--text);
  letter-spacing: -0.02em;
}

.hero-title {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.hero-affil {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.affil-logo {
  height: 20px;
  width: auto;
  border-radius: 2px;
  opacity: 0.7;
}

.hero-tagline {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 34px;
}
.hero-tagline em {
  font-style: normal;
  color: var(--text);
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 1px;
}

.hero-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.hero-socials {
  display: flex;
  gap: 8px;
}
.hero-socials a {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: #fff;
  border: 1.5px solid var(--border-hover);
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: all var(--t);
}
.hero-socials a:hover {
  color: var(--accent);
  border-color: rgba(200,16,46,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Profile photo */
.photo-ring {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--indigo) 100%);
  box-shadow: var(--shadow-lg);
  flex-shrink: 0;
}
.photo-ring img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #fff;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-light);
  font-size: 0.95rem;
  animation: bounce 2.4s ease-in-out infinite;
  z-index: 1;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  align-items: start;
  margin-top: 48px;
  max-width: 760px;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.97rem;
}
.about-text strong { color: var(--text); }

.service-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.service-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: 4px;
  white-space: nowrap;
}
.service-venues { display: flex; flex-wrap: wrap; gap: 6px; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 24px 18px;
  text-align: center;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.stat-card:hover {
  border-color: rgba(200,16,46,0.25);
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}
.stat-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================================
   RESEARCH
   ============================================================ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 0;
}

.research-card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 30px 26px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.research-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--t);
}
.research-card:hover {
  border-color: rgba(200,16,46,0.25);
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}
.research-card:hover::after { opacity: 1; }

.research-card--highlight {
  border-color: rgba(79,70,229,0.2);
  background: linear-gradient(145deg, #fff 0%, rgba(79,70,229,0.025) 100%);
}
.research-card--highlight::after {
  opacity: 1;
  background: linear-gradient(90deg, var(--indigo), var(--accent));
}

.research-icon {
  width: 48px;
  height: 48px;
  background: rgba(200,16,46,0.07);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 18px;
}
.research-icon--indigo {
  background: rgba(79,70,229,0.08);
  color: var(--indigo);
}

.research-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text);
}
.research-card p {
  color: var(--text-muted);
  font-size: 0.89rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.new-badge {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--indigo);
  color: #fff;
  padding: 3px 8px;
  border-radius: 100px;
}

.research-tags, .pub-tags, .service-venues {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.73rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pub-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 36px 0 24px;
}

.pub-tab {
  font-family: 'Inter', sans-serif;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-muted);
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  padding: 7px 16px;
  cursor: pointer;
  transition: all var(--t);
}
.pub-tab:hover { color: var(--text); border-color: var(--border-hover); background: var(--bg-alt); }
.pub-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pub-item {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  padding: 20px 22px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.pub-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
  transform: translateX(3px);
}
.pub-item--featured { border-left: 3px solid var(--accent); }
.pub-item.hidden { display: none; }

.pub-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  min-width: 56px;
  flex-shrink: 0;
  padding-top: 2px;
}

.pub-badge {
  font-size: 0.67rem;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 5px;
  text-align: center;
  white-space: nowrap;
}
.badge-journal { background: rgba(79,70,229,0.1);   color: #4338ca; border: 1px solid rgba(79,70,229,0.2); }
.badge-conf    { background: rgba(5,150,105,0.09);  color: #047857; border: 1px solid rgba(5,150,105,0.2); }
.badge-patent  { background: rgba(180,130,0,0.09);  color: #92660a; border: 1px solid rgba(180,130,0,0.2); }
.badge-review  { background: rgba(100,100,130,0.08); color: #64648a; border: 1px solid rgba(100,100,130,0.15); }
.badge-domestic-j { background: rgba(20,150,80,0.09);  color: #0d6e3c; border: 1px solid rgba(20,150,80,0.2); }
.badge-domestic-c { background: rgba(180,100,0,0.09); color: #8a4a00; border: 1px solid rgba(180,100,0,0.2); }

.pub-year {
  font-size: 0.77rem;
  color: var(--text-light);
  font-weight: 500;
}

.pub-thumb {
  width: 170px;
  flex-shrink: 0;
}
.pub-thumb img {
  width: 100%;
  border-radius: 6px;
  object-fit: contain;
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.pub-content { flex: 1; min-width: 0; }

.pub-title {
  font-weight: 600;
  font-style: normal;
  color: var(--text);
  font-size: 0.93rem;
  margin-bottom: 5px;
  line-height: 1.5;
}
.pub-authors {
  color: var(--text-muted);
  font-size: 0.86rem;
  margin-bottom: 4px;
}
.pub-authors strong { color: var(--text); }
.pub-venue {
  color: var(--text-muted);
  font-size: 0.83rem;
  margin-bottom: 7px;
}
.pub-rank {
  font-size: 0.79rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.rank-badge {
  display: inline-block;
  background: rgba(200,16,46,0.07);
  color: var(--accent);
  border: 1px solid rgba(200,16,46,0.2);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.76rem;
}
.rank-badge--conf {
  background: rgba(180,130,0,0.08);
  color: #92660a;
  border-color: rgba(180,130,0,0.2);
}
.rank-suffix { color: var(--accent); }

.pub-tags { display: none; }

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  text-decoration: none;
  transition: color var(--t), border-color var(--t);
}
.pub-link i { font-size: 0.65rem; }
.pub-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 36px;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -27px;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-alt);
  box-shadow: 0 0 0 2px rgba(200,16,46,0.15);
}
.timeline-marker--edu {
  background: var(--accent);
  box-shadow: 0 0 0 2px rgba(200,16,46,0.15);
}

.timeline-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  padding: 20px 22px;
  transition: border-color var(--t), box-shadow var(--t);
}
.timeline-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.timeline-period {
  display: block;
  font-size: 0.77rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 5px;
}
.timeline-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.timeline-org {
  font-size: 0.87rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 9px;
}
.timeline-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 4px;
}
.timeline-card ul {
  padding-left: 18px;
  list-style: disc;
}
.timeline-card li {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 4px;
}

/* ============================================================
   AWARDS
   ============================================================ */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 48px;
}

.award-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  padding: 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.award-card:hover {
  border-color: rgba(200,16,46,0.25);
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}

.award-icon {
  width: 42px;
  height: 42px;
  background: rgba(200,16,46,0.07);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.award-year {
  display: block;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}
.award-body h3 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.award-body p {
  font-size: 0.83rem;
  color: var(--text-muted);
  margin-bottom: 7px;
}
.award-link {
  font-size: 0.77rem;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: opacity var(--t);
}
.award-link:hover { opacity: 0.7; }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}

.skills-group {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  padding: 26px;
  transition: border-color var(--t), box-shadow var(--t);
}
.skills-group:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}
.skills-group h3 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.skills-group h3 i { color: var(--accent); }

.skill-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-tag {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 100px;
  transition: background var(--t), border-color var(--t), color var(--t);
  cursor: default;
}
.skill-tag:hover {
  background: rgba(200,16,46,0.06);
  border-color: rgba(200,16,46,0.22);
  color: var(--accent);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-top: 48px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-muted);
  padding: 14px 18px;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  font-size: 0.9rem;
  transition: all var(--t);
}
.contact-item i {
  width: 18px;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}
.contact-item:hover {
  color: var(--text);
  border-color: rgba(200,16,46,0.3);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.contact-note p {
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.8;
  margin-bottom: 26px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
  color: var(--text-light);
  font-size: 0.83rem;
}
.footer a { color: var(--accent); }

/* ============================================================
   RESPONSIVE — 900px
   ============================================================ */
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
    justify-items: center;
  }
  .hero-photo { order: -1; }
  .hero-affil, .hero-links, .hero-socials { justify-content: center; }
  .hero-tagline { margin: 0 auto 34px; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-stats { max-width: 380px; margin: 0 auto; }
  .research-grid { grid-template-columns: 1fr; }
  .skills-grid   { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; gap: 32px; }
}

/* ============================================================
   RESPONSIVE — 768px (mobile menu)
   ============================================================ */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    padding: 14px;
    flex-direction: column;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
    box-shadow: var(--shadow);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { width: 100%; text-align: center; padding: 12px; }

  .section { padding: 64px 0; }

  .pub-item { flex-wrap: wrap; }
  .pub-thumb { width: 100%; order: -1; }
  .pub-thumb img { max-height: 200px; }
  .pub-meta { flex-direction: row; }

  .photo-ring { width: 170px; height: 170px; }
}

@media (max-width: 520px) {
  .hero-name { font-size: 2.7rem; }
  .awards-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
}